ADPF: Handle preferred interval on unsupported device

The original java implementation just passed along whatever the server
returns which is -1 on unsupported devices. So do that here as well.

Test: PerformanceHintManagerTest passes on unsupported device
Bug: 194691581
Change-Id: I8ac07737e6ce52debf55478880d71f038f258056

native/android/performance_hint.cpp

@@ -111,8 +111,7 @@ APerformanceHintManager* APerformanceHintManager::create(sp<IHintManager> manage
         return nullptr;
     }
     if (preferredRateNanos <= 0) {
-        ALOGE("%s: PerformanceHint invalid preferred rate.", __FUNCTION__);
-        return nullptr;
+        preferredRateNanos = -1L;
     }
     return new APerformanceHintManager(std::move(manager), preferredRateNanos);
 }